Measuring device for measuring gearing and diameters in rotationally symmetrical components

ABSTRACT

A measuring device for measuring gearing and diameters in rotationally symmetrical components ( 2 ). The device possesses a fixed feeler pin ( 9 ) and a movable feeler pin ( 10 ). The movable feeler pin ( 10 ), with the aid of a spring actuated mechanism ( 14 ), automatically confines the measurable component ( 2 ) in a defined measurement position.

This application is a national stage completion of PCT/EP2003/010202filed Sep. 13, 2003 which claims priority from German Application SerialNo. 102 44 025.5 filed Sep. 21, 2002.

FIELD OF THE INVENTION

The invention concerns a measuring device for the measurement of gearingand diameters of rotationally symmetrical components to be measured.

BACKGROUND OF THE INVENTION

Measurement devices of the state of the technology, adaptable for themeasurement of gearing and diameters of rotationally symmetricalcomponents, have been established and known for a considerable time.With these so-called universal measurement apparatuses, it is possibleto determine inside and outside diameters, sphericities of inside andoutside gearing as well as heights. These universal measurementapparatuses are predominately intended for installation in specializedmeasurement-rooms and are suitable for measuring components with amaximum diameter of some 300 mm. The measurement equipment in usepossess a fixed and a movable feeler pin. The component is positionedagainst the fixed feeler pin and with the aid of the moveable feelerpin, is brought into its final setting, i.e., the measurement position.This can be carried out manually or by spring adjustment.

Measurement devices conforming to the state of the technology areinappropriate for large, heavy components and are considered to be onlyconditionally usable under shop conditions. Generally the so describedmeasurement devices require special measurement rooms, which areisolated from external conditions. In the case of sizable and heavycomponents, the movable feeler pin is generally inoperable with regardto bringing the component into a position for measurement. The result ofthis can be reflected in faulted measurement results. Further, thedanger is present that the feeler pin becomes deformed, because ofstrong mechanical loadings, whereby the measurement equipment findsitself in need of frequent repair. Since the measurement devicefrequently allows only small movements of the feeler pin equipment,installation and removal of heavy components can also be a source ofdamage.

The present invention has the purpose of making a measuring deviceavailable with which sphericity measurements of inner and outer gearing,as well as inside and outside diameters of cylindrical and conicalcomponents, can be precisely determined, which device is sturdilyconstructed and is adaptable for direct application in the workplace.Especially, the invented measurement device should have the capabilityof correctly measuring large and heavy components.

The stated purpose of the invention is achieved by a generic measurementdevice and which the device is applicable to the measurement of gearingand diameters of rotation-symmetrical components.

SUMMARY OF THE INVENTION

By way of mechanical stability in the construction of the measurementdevice as well as its component feeler pins, the components may beplaced directly on the surface plate of the table of the device. Thisenables a greater degree of monitoring with little loss of time andpower. The component to be measured can be laid on a measuring surfaceplate at a convenient working height and by way of a manipulationapparatus which acts upon the automobile jack principle, the componentcan be positioned by the measurement feelers. The height-adjustablemeasurement device also possesses operational aids on its upper surface,such as conveyor rollers, by way of which the component underexamination can be easily positioned. This component need not be broughtinto a predefined measurement position; much more the component isinitially simply placed approximately between the fixed and movablefeeler pins. By way of the activation of the actual measurementprocedure, the component will then be pressed against the fixed feelerpin, thus acquiring a specified measurement position by displacement bythe movable feeler pin. The activation can be done, for example, by thepivoting of a lever, which positions the movable feeler pin by way of aneccentric disk. For this purpose, a spring-force activated mechanismforces the movable feeler pin against the component. The spring forcewhich, in the following, will also be termed “measurement force” can besteplessly applied and in like manner, also corrected. By way of anample clearance of the movable feeler pins from the component, an easyinsertion and removal of the component is assured and simultaneouslyboth the measurement device and the component are protected from damage.Since the moveable feeler pin has a large zone of free travel to obtainmeasurements, the principal operation of the equipment allows gearingand diameter measurements to be determined, as well as dimensions ofconical gearing, structural parts, steps, perforations and borings. Forthis purpose, the measuring equipment possesses a movable table, thelength of which can be bounded by limit switches. In a case ofoverstepping the limits, a slip clutch is activated, which preventsdamage. The movement of the table can be read off from a graduated scaleon a measurement dial. The motion of the measuring table can beaccomplished either manually or with the aid of outside force. Areduction of uncertainties and measurement error is achieved by way ofthe simple operation and the automatic positioning of the workpieceduring the measurement.

Advantageous and useful embodiments of the invention are made evident inthe subordinate claims. The invention, however, is not limited by thecombination of features exhibited in the claims, but much more, it makesavailable for the expert, within the statement of purpose, additionalsignificant possibilities for combinations and individual claimfeatures.

BREIF DESCRIPTION OF THE INVENTION

The invention will now be described, by way of example, with referenceto the accompoanying drawings in which:

FIG. 1 is a section through an invented measurement device or themeasurement of gearing and diameters in the case of rotation-symmetricalcomponents; and

FIG. 2 is a three dimensional view of the invented measurement devicewhich is shown in FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a component 2 comprising a gear with conical, internaltoothing, which gear has been placed upon a measuring table 1. By way ofa hand operated crank 3, the measurement table 1 can be raised to itsnecessary measuring height. This raising done by a lifting apparatus 4which, in this case, is operated as a scissors-linkage. The lineardisplacement of the measurement table 1 can be read from a graduatedscale 5 on a measurement dial 6. A horizontal movement of the table canbe confined to an optional length by way of limit switches 7. If theselimit switches 7 are impinged upon, then a slip clutch 8 is activated,which prevents an overrun of the limit switches 7. The component 2 isprepositioned in an approximate location between a fixed feeler pin 9and a movable feeler pin 10. The measurement procedure is initiated bythe displacement of a lever 12 which moves an eccentric disk 13. Aspring actuated mechanism 14 displaces the movable feeler pin 10 withthe aid of an apparatus 15 in the form of a linear slide arrangement, byway of which the component 2 is fixed in its position. The measuringforce of the spring actuated mechanism 14 can be steplessly adjusted viaa screw 16.

FIG. 2 shows the component 2 on the measurement table 1 where saidcomponent lies in its preposition between the fixed feeler pin 9 and themovable feeler pin 10. The prepositioning is eased by a frictiondiminishing aid 11, in this case, depicted as a roller framing, whichframing is integrated into the surface of the measuring table 1. By thedisplacement of a lever 12, the actual measurement procedure isinitiated. The spring activated mechanism 14 is caused to function viathe eccentric disk 13 which, with the aid of spring force, places themovable feeler pin 10 in its measuring position. The spring force can beapplied in a stepless manner by way of a threaded arrangement and, ifnecessary, can be corrected. The movable feeler pin 10 extends itselfoutward and brings the component 2 into its measurement position.Because of its active measuring path, the movable feeler pin 10 can alsocircumscribe the inside contour and examine the inner gearing of the ofthe component 2. For this purpose, the movable measurement feeler pin 10is brought into its upward position by a renewed displacement of thelever 12. The measurement table 2, with the aid of the lifting apparatus3, is placed in a respectively different measuring position by the crank3. The measurement procedure can be o. reactivated many times byrepeated adjustment of the lever 12 which activates the positioning andthe elevation of the movable feeling pin 10.

REFERENCE NUMERALS

-   1 measuring table-   2 component (the workpiece to be measured)-   3 manual crank-   4 lifting apparatus-   5 graduated scale-   6 measurement dial-   7 limit switches-   8 slip clutch-   9 fixed feeler pin-   10 moveable feeler pin-   11 assist means-   12 lever-   13 eccentric disk-   14 spring actuated mechanism-   15 apparatus-   16 screw

1. A measuring device for measuring gearing and diameters ofrotationally symmetrical components (2) with a fixed feeler pin (9) anda movable feeler pin (10), the component (2), with the aid of a springactuated mechanism (14), which when activated by an auxiliary mechanism,is pressed by the movable feeler pin (10) against the fixed feeler pin(9) and thus is brought into a defined position for measurement, theauxiliary mechanism possesses a pivotal lever (12), which, by means ofan eccentric disk (13) positions the movable feeler pin (10) in ameasuring position.
 2. The measuring device according to claim 1,wherein the component (2), is guided to the fixed feeler pins (9) andthe movable feeler pin (10) by a raising apparatus (4), which isattached to a measurement table.
 3. The measuring device according toclaim 2, wherein the raising apparatus (4) possesses at least one enddetent (7), with which a defined stroke can be adjusted.
 4. Themeasuring device according to claim 3, wherein upon an overriding of theend detent (7), a slip clutch (8) is activated, in order to avoiddamage.
 5. The measuring device according to claim 2, wherein a traveldistance of the lifting apparatus (4) can be read from markedcalibrations (5) on a measurement dial (6).
 6. The measuring deviceaccording to claim 2, wherein a motion of the lifting apparatus (4) canbe done manually or by outside force.
 7. The measuring device accordingto claim 1, wherein the measurement table (1) possesses on a surface afriction reducing arrangement (11), whereby the component (2) can beeasily positioned.
 8. A measuring device for accurately positioning andmeasuring gearing and diameters of rotationally symmetrical components(2), the device comprising; a support table upon which the component (2)is axially supported and radially adjustable; a fixed feeler pin (9) anda movable feeler pin (10) moveable relative to the support table; acomponent positioning mechanism for adjusting the component (2) to pressthe component (2) against the fixed feeler pin (9) thus bringing thecomponent (2) into a defined measurement position on the support table,the component positioning mechanism comprising; a lever actuating aneccentric disc which via a spring mechanism (14) moves a linear slide toengage the movable feeler pin (10) with the component and radiallyadjust the component into the defined measurement position.
 9. Themeasuring device according to claim 8 wherein the component (2) isaxially adjustable relative to the fixed feeler pins (9) and the movablefeeler pin (10) by a raising apparatus (4) connected to the supporttable.
 10. The measuring device according to claim 9, wherein theraising apparatus (4) possesses at least one end detent (7), with whicha defined stroke can be adjusted.
 11. The measuring device according toclaim 10, wherein upon an overriding of the end detent (7), a slipclutch (8) is activated, in order to avoid damage.
 12. The measuringdevice according to claim 8, wherein a travel distance of the liftingapparatus (4) can be read from marked calibrations (5) on a measurementdial (6).
 13. The measuring device according to claim 8, wherein amotion of the lifting apparatus (4) can be done manually or by outsideforce.
 14. A measuring device for measuring gearing and diameters ofrotationally symmetrical components (2) with a fixed feeler pin (9) anda movable feeler pin (10), whereby the component (2), with the aid of aspring actuated mechanism (14), which when activated by an auxiliarymechanism, is pressed by the movable feeler pin (10) against the fixedfeeler pin (9) and thus is brought into a defined position formeasurement the auxiliary mechanism possesses a pivotal lever (12),which, by means of an eccentric disk (13) positions the movable feelerpin (10) in a measuring position; and wherein the component (2), isguided to the fixed feeler pins (9) and the movable feeler pin (10) by araising apparatus (4), which is attached to a measurement table and theraising apparatus (4) possesses at least one end detent (7), with whicha defined stroke can be adjusted, and 21 slip clutch (8) is activated,upon an overriding of the end detent (7), to avoid damage.